welcome {$Think.session.username|default='guest'}
<form action="__URL__/login" method="post">
<input type="text" name="username" />
<input type="password" name="password" />
<input type="submit" value="submit"/>
</form>


<form id="search" action="__URL__/search" method="get" >
 <input type="text" name="key"/>
<input type="submit" value="baidu"/>
</form>

hello {$name}